Merge pull request #21 from approvers/action

Dockerイメージ作成用DockerfileとGitHub Actions用意

.github/workflows/docker.yaml

@@ -0,0 +1,34 @@
+name: Docker
+
+on:
+  push:
+    branches:
+      - master
+
+    tags:
+      - v*
+
+env:
+  IMAGE_NAME: change-status-go
+
+jobs:
+  push:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Build an image with a tag
+        run: docker build -t app .
+
+      - name: Log into the registry
+        run: echo "${{ secrets.GITHUB_TOKEN }}" | docker login docker.pkg.github.com -u ${{ github.actor }} --password-stdin
+
+      - name: Push the image
+        run: |
+          IMAGE_ID=docker.pkg.github.com/${{ github.repository }}/$IMAGE_NAME
+          VERSION=$(echo "${{ github.ref }}" | sed -e 's,.*/\(.*\),\1,')
+          [[ "${{ github.ref }}" == "refs/tags/"* ]] && VERSION=$(echo $VERSION | sed -e 's/^v//')
+          [ "$VERSION" == "master" ] && VERSION=latest
+          docker tag app $IMAGE_ID:$VERSION
+          docker push $IMAGE_ID:$VERSION

Dockerfile

@@ -0,0 +1,11 @@
+FROM golang:1.14.4-alpine3.12 as build
+RUN mkdir /src
+COPY . /src
+WORKDIR /src
+RUN go build -a -tags netgo -installsuffix netgo -o change-status-go
+
+
+FROM scratch
+COPY --from=build /src/change-status-go /bot/
+WORKDIR /bot/
+ENTRYPOINT [ "/bot/change-status-go" ]